View full sizeThe manufacturer of Buckyballs, which stresses its sets are intended for adults, placed a statement on its website noting the recent case. Packaging also warns of the swallowing hazard for children. (Buckyballs.com)

Magnets in toys have become a concern for parents and health officials after a series of incidents involving young children swallowing magnetic balls included in various toy sets.

The Washington Post reports an Oregon toddler had to have 37 Buckyballs magnets removed from her intestines this week after swallowing the items.

Other accidents involving swallowed magnets include that case of a 10-year-old who had to have her appendix removed after swallowing two magnetic balls she was using to pretend she had her tongue pierced and a 20-month-old boy who died from swallowing nine magnets included in an older sibling's toy set in 2005.

Makers of "Buckyballs" issued a statement saying their products are intended to serve as stress relievers for adults, reports MSNBC.

The company voluntary recalled the product in 2010 to include warnings on the packaging stating that the products are intended for ages 13 and up.

The Consumer Product Safety Commission says accidents like these are not uncommon. Twenty-two accidents involving children swallowing magnetic toys were reported from 2009 to October 2011, according to the Los Angeles Times.